(19)

(11)

EP 2 247 399 A2

(12)

(88) Date of publication A3: 26.11.2009 (43) Date of publication: 10.11.2010 Bulletin 2010/45 (21) Application number: 09713328.4 (22) Date of filing: 17.02.2009

(51) International Patent Classification (IPC):  B23C 5/12(2006.01) B23C 5/02(2006.01) B23C 5/00(2006.01) B23C 5/20(2006.01) B23C 5/22(2006.01) (86) International application number: PCT/US2009/034240 (87) International publication number: WO 2009/105408 (27.08.2009 Gazette 2009/35)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 22.02.2008 US 35461 (71) Applicant: Kennametal Inc. Latrobe, PA 15650-0231 (US)	(72) Inventors: WAGGLE, James, M. Derry Pennsylvania 15627 (US) GAMBLE, Kevin, M. Stahlstown Pennsylvania 15687 (US) DE SOUZA FILHO, Ruy, Frota Latrobe Pennsylvania 15650 (US) CRAIG, Karen, A. Greensburg Pennsylvania 15601 (US) (74) Representative: Prinz & Partner  Patentanwälte Rundfunkplatz 2 80335 München 80335 München (DE)